How much change did Sophie receive after purchasing three fudge slices for $3.98 each with a $20 bill?

To determine how much change Sophie received after her purchase, we first need to calculate the total cost of the three fudge slices. Each slice costs $3.98, so the total cost for three slices is calculated by multiplying the price of one slice by the number of slices:

Total cost = Price per slice × Number of slices = $3.98 × 3 = $11.94.

Next, we subtract this total cost from the amount Sophie paid, which is $20:

Change received = Amount paid - Total cost = $20 - $11.94 = $8.06.

This calculation shows that Sophie received $8.06 in change after her purchase.